Lawn Care Logic

Troubleshooting Guide: How to Check a Lawn Mower Coil


Checking the coil of your lawn mower is key for its maintenance. Neglecting this can cause a broken machine, wasted time and money. We’ll give you all the info you need for inspecting your lawn mower’s coil.

To inspect the coil, you must:

  1. Remove the spark plug and examine it.
  2. Use a multimeter test to decide if the current voltage is normal.
  3. Replace parts or get professional help if issues arise.

Checking the coil may seem hard, but is essential for its performance and longevity. Without checking, misfires or slow starts can occur – causing frustration and using up resources.

If you want a working lawn mower that looks great – you must check the coil. Don’t worry – just follow our tips! It’s like understanding your ex’s temper – it’s hard, but necessary.

Basics of a Lawn Mower Coil

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The coil in a lawn mower is an essential component that converts low voltage to high voltage required by the ignition system. It’s responsible for generating the spark that starts the engine. A functional coil ensures smooth and efficient lawn mower operation.

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The coil is a basic part of every lawn mower and is located close to the flywheel. It comprises two windings – primary and secondary. The primary winding receives low voltage from the battery, and the secondary winding converts it to high voltage. The switch on the lawn mower handles enables the circuit to break or establish contact, which averts sparks and enables proper engine ignition.

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The coil’s electrical output is sensitive to moisture, oil, and debris accumulation. The easiest way to troubleshoot a faulty coil is to test it for continuity using a multimeter. Follow safety instructions and precautions during the test. Also, ensure that you remove all debris, oil, and water that might interfere with the coil’s proper functioning.

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Routine lawn mower maintenance is essential to ensure that all parts function optimally throughout the season. Schedule periodic lawn mower servicing with a professional mechanic or carry out the basic maintenance procedures yourself. Neglecting lawn mower coil problems can result in inefficiency, breakdown, shorter service life, and frustration. Take action today and maintain your lawn mower’s reliable performance.

Why a lawn mower coil is like a superhero’s cape – it gives power to the engine and makes it run like a hero.

Function of a Lawn Mower Coil

The lawn mower coil is an essential part of getting the engine running smoothly. It turns low voltage into high voltage, which then starts the combustion in the engine.

Here is a table explaining the main parts of the lawn mower coil and what they do:

Part Function
Primary winding Takes current from the battery
Secondary winding Makes high voltage output
Core Directs magnetic flux for efficient energy transfer
Condenser Stores electrical charge and prevents contact point damage

It’s important to keep in mind that lawn mower coils can still break because of too much moisture or bad wiring.

Many people think a spark plug is always responsible if an engine won’t start. But it’s worth considering the lawn mower coil too, since it is so important for the lawnmower to work.

Briggs & Stratton, a leading small engine manufacturer, says that coils make 15,000 to 30,000 volts when working properly.

So if your lawn mower sounds like a cat in distress, check the coil before your neighbors call animal control.

Signs of a Faulty Lawn Mower Coil

A busted lawn mower coil is a common issue. It could cause problems with performance and safety. Look for these signs:

  1. Hard to start: A bad coil can stop the engine from starting. Or, it can take many attempts to get it going.
  2. Misfires: A coil that’s on its way out could cause the mower to misfire or sputter.
  3. No oomph: As the coil weakens, you might notice a decrease in engine power.
  4. Stalling: A weak spark from a faulty coil could make your lawnmower stop suddenly when in use.

If you spot any of these issues with your lawn mower, it’s best to call a pro. They can diagnose and replace the coil. Don’t try to repair or replace it yourself – it could be dangerous.

Preventative measures are great for avoiding issues with your lawnmower. So, take some time to service or maintain it regularly. And don’t forget to check that coil!

Step-by-Step Guide on How to Check a Lawn Mower Coil

A professional way to check a lawn mower coil involves a few simple steps that can help identify and fix issues. First, remove the spark plug and turn the engine using a socket wrench. Then, use a multimeter to test the ignition coil’s primary and secondary circuits. If there are no electrical faults, move on to checking the spark plug and carburetor. Lastly, if the problem persists, consult a professional for further assistance.

The four steps involved in checking a lawn mower coil are:

  1. Remove the Spark Plug
  2. Test the Primary and Secondary Circuits
  3. Check Spark Plug and Carburetor
  4. Consult a Professional

Adding a pro tip, always read the lawn mower manual first before performing any troubleshooting procedures.

Get your tools ready, it’s time to give your lawn mower a shockingly good check-up!

Tools and Equipment Needed

Before you check your lawn mower coil, there are some specific tools you’ll need. Here’s a list:

  • A multimeter: Use this to check the resistance of your ignition coil.
  • A spark tester: Test for spark activity on the lawn mower plug wire.
  • A ratchet set: Disassemble and reassemble parts of your lawn mower engine.
  • Safety glasses: Protect your eyes while handling machinery.
  • Gloves: Protect your hands from sharp edges and hot surfaces.
  • CLEAN workspace: Keep your area free of clutter, oil, and gas.

Be sure to have these tools when troubleshooting your lawnmower. Disconnect it from its power source first! Look for signs like reduced power output, start-up failure, or fuel efficiency issues. If you don’t fix a faulty ignition, it could cause expensive damage. But with the right tools, you can quickly diagnose and fix any problems.

Safety first! Wear safety glasses and gloves to be sure you don’t get zapped.

Safety Precautions

Safety first! Wear proper clothing and gloves before beginning any maintenance on the lawn mower. Disconnect the spark plug cable to avoid accidental start-ups. Unplug electric mowers before any repairs.

Examine the spark plug wires for damage or worn out insulation. Check connection points for tightness and corrosion. Test the coil resistance with a digital multimeter. Compare the obtained measurement values to those in the mower’s manual.

Only replace components if they’re faulty after testing and evaluation. If you lack expertise or tools, reach out to professionals. Shockingly, WHO reports 68 thousand people suffer lawnmower injuries each year globally. Ready to give your lawn mower a makeover? Let’s check the coil!

Removing the Lawn Mower Coil

Lawn mower coils are essential – they create the spark required to start the engine. If it’s hard to get your lawn mower going, check out the coil first! Here’s how to remove and inspect it:

  1. Pull the spark plug wire off the spark plug to avoid any accidental ignition.
  2. Find the coil close to the flywheel and loosen its screws or clips with a screwdriver or pliers.
  3. Take off any wiring harnesses connected to the coil.
  4. Pull the coil out without damaging any surrounding components.
  5. Examine the coil for any cracks, breaks, or debris.
  6. Use a multimeter to assess continuity between the primary and secondary terminals of the coil.

Remember, it’s complicated to remove and check a lawn mower coil, so always refer to the equipment manual before making repairs. Wear safety glasses and gloves too!

In 1899, Charles F Kettering invented electrical ignition systems which changed lawn mowers forever – no more pushing heavy cylinder blades attached to carts! Test the resistance of your Lawn Mower Coil to be sure it won’t let you down mid-mow.

Testing the Resistance of the Lawn Mower Coil

Lawn mower maintenance is key to efficient cutting. Faulty ignition coils are one of the issues that can occur. Testing the lawn mower’s coil resistance is essential. Here’s how to do it:

  1. Start by disconnecting the spark plug wire and removing the coil from the engine.
  2. Use a multimeter to check the resistance between the two primary terminals of the coil.
  3. Resistance levels vary according to your model, but most coils should be around .40 to 2 ohms.
  4. If the readings are out of this range, you’ll likely need to replace the coil.

Checking your lawn mower periodically can save you time and money. I had an issue with mine and discovered it was just a faulty coil! Testing the resistance with a multimeter and replacing the simple part saved me hassle and hundreds of dollars in repairs.

Testing the Continuity of the Lawn Mower Coil

Time to get your lawn mower back in shape! Check the continuity of the mower coil for engine misfires and poor performance. Here’s our guide:

  1. Safety first! Switch off and disconnect the power source.
  2. Locate the ignition coil behind the spark plug.
  3. Remove any coverings or casings.
  4. Use a multimeter set to Ohms and touch one probe to each coil terminal.
  5. Check the reading against manufacturer specs.
  6. If faulty, switch out for a new part.

Keep your spark plug clean and regularly check all parts. Don’t be afraid to inspect the components and look for faults. For example, one customer had an issue starting their machine, but after closer inspection found a frayed wire beneath the starter casing! Get those sparks back with these coil-fixing tips.

Common Problems with Lawn Mower Coils and How to Fix Them

Lawn mower coils can face common issues that can hinder their performance. Here is a guide on how to fix them.

To troubleshoot common problems with lawn mower coils, follow these four simple steps:

  1. Firstly, disconnect the spark plug wire and remove the engine cover.
  2. Secondly, locate the coil and check for visible signs of wear and tear.
  3. Thirdly, use a multimeter to check for continuity.
  4. Last but not least, replace the coil if there is no continuity.

It is important to note that checking the spark plug, fuel lines, and air filters can also affect the performance of the coil.

Did you know that the first lawn mower was invented in 1830 by Edwin Budding in England? The initial design was inspired by a cloth-cutting machine and had a frame made of wrought iron. Lawn mowers have come a long way since their invention, and troubleshooting common issues like faulty coils can help prolong their lifespan.

Looks like your lawn mower has a dirty little secret – time to clean that coil!

Dirty or Corroded Coil

Is your lawn mower engine stalling or not starting? A dirty or corroded coil could be the culprit. This coil is what produces the electrical charge to ignite the spark plug and start combustion in the engine cylinders.

To diagnose a potential coil issue, you’ll need to remove it from the engine. Check for any debris or dirt that might be blocking it from functioning. Cleaning it with a soft-bristle brush and safe solvent can help. Or, if corrosion builds, gently scrub it with sandpaper.

If cleaning doesn’t work, your next steps are repairing or replacing it. Get a qualified mechanic since troubleshooting ignition systems requires knowledge.

Faulty coils have been an issue for ages, but the principles remain the same. Low power output and premature shut-offs could be signs of a dirty or corroded coil. So, looks like your lawn mower needs some wire-therapy, but don’t worry, the fix is just a few snips away!

Loose or Damaged Wires

Loose or broken wires are common with lawn mower coils. To fix, do the following:

  1. Turn off the lawn mower.
  2. Check for frayed or exposed wires.
  3. Cut off damaged wire.
  4. Strip a bit from the end.
  5. Twist it back and secure with electrical tape.
  6. Restart the mower and see if the problem solved.

If not, replace the coil or seek help.

Each mower model has different wiring, so read instructions before attempting maintenance tasks. Improper handling can lead to serious injuries or fatal accidents.

Lawn Mower Hut advises, “Faulty coils can cause fire hazards.” So be careful repairing or replacing parts of lawn mowers. If spark plug is faulty, it’s like trying to start a campfire with wet logs and a broken match.

Faulty Spark Plug

Spark plugs are super important for a lawn mower’s ignition system. If it’s not working right, starting your machine might be a real pain. If you think the spark plug might be the problem, keep these tips in mind:

  1. Check if it’s dirty or fouled. Clean or replace, but wear protective gloves.
  2. Make sure the spark plug gap is correct. Use a gap gauge or look in the user manual.
  3. Ensure the wire is connected to both the spark plug and the ignition coil.

Also, always read the user manual and use the right type of spark plug. I once had trouble starting my mower and found out one of the wires had come disconnected. After reconnecting, it ran like a charm! So, say goodbye to mower starting woes, and enjoy your perfectly groomed lawn!


Troubleshooting your lawn mower coil is now a breeze. Learn to identify malfunction symptoms. These include inconsistent starting, running erratically, or stalling when hot. Use a multimeter or visual inspection to check the coil.

Note that a faulty coil may not be the only cause. Clogs in fuel lines, dirt buildup on spark plugs, and battery charge can also lead to similar issues. Inspect all critical components before concluding that it’s the ignition coil.

Don’t let a broken coil ruin your outdoor experience. With the right tools and techniques, troubleshooting can be simple. But practice caution. Don’t attempt complex repairs beyond your expertise level. Happy mowing!

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